Method of impregnating composition board



Patented Mar. 12, 1929.

UNITED STATES GUSTAVE KLINKENSTEIN, OFNEWABK, AND GUSTAVE D. HAGNUS, OF EAST ORANGE,-

1,105,090 PATENT OFFICE.

' NEW JERSEY, ASSIGNORS TO ms 80 WALDSTEIN 00., OF NEWARK, NEW JERSEY,

A. CORPORATION OF NEW JERSEY.

METHOD OI" IMPREGNATING COMPOSITION BOARD.

No Drawing.

This invention relates generally to a novel method of applying impregnating material; and the invention has reference more particularly to a novel method especially suitable for im regnatingwith' adesired compound on su stance composition board made of various kinds of material such as concrete, asbestos, wood fibre, plaster, etc.

The invention has for its principal object to provide a novel method of im regnating composition'board with material or the purpose of filling the pores and internal interstices of said material, thus serving to both impregnate the body and coat the surfaces thereof with an impermeable water and alkali resisting material and whereb at the same time the said board is rendere lacquer resisting. v

The invention has for a further object to so prepare composition board, such as is com monly used inbuilding operations, by impregnating the same with the novel impregnating compound so that an impermeablelacuer resisting ass is produced from the initially porous com osition board, and where-' 40 tion are combined in substantially the follow ing proportions to wit,

. Percent China wood oil 13 Linseed oil. 25 Turpentine 4 Heavy naphtha 58 When mixed in such proportionsthe basic impregnating compound is found to be very efficient and adapted, especially when hot, to readily penetrate the pores or interstices of the composition board to which it is to be applied. It will be understood, however, that we do not necessarily limit ourselves tothe exact proportions above named, since some Application filed May 6, 1927. Serial Io. 189,452.

variation of the relative proportions within The application of the impregnatingcom- I pound to composition board is carried on by the following novel method or'process.

The board to be impregnated is first heated for a period of 4 to 5 hours at 65 C. This heating operation may be carried on in a suitable drying kiln or oven or any other suitable form of drying room. The step of thus heating the composition board operates-to-remove therefrom any residual moisture, while at the same time by expansion expelling air from thejpores or interstices of the same.

After the composition board has been heated and thus thoroughly dried the same is removed from the drying room and is immediately immersed, while still hot, in the impregnating compound above described and allowed to remain so immersed in said compound for a period of from 12 to 14 hours.

This impregnation operationor step may be carried out in the following manner:

Suitable rats are provided having means to maintainthe content thereof at desired temperature and said vats are supplied with the novel impregnating compound which is in liquid solution, the said compound being heated and maintained at a temperature of 80 to 90 C. When the composition board is immersed in the hot compound the latter will enter into and permeate the pores or interstices thereof so that at the end of from 12 to 14 hours of. immersion -and at a temperature of 80 to 90 C. the body of the composition board will be completely "impregnated throughout its .mass with the compound which will fill all the pores" or interstices thereof and will as Well coat the surfaces of the same.

After the above described impregnating step, the impregnated board is again sub- "ourselves to the exact time of drying, im-

mersing or baking periods above named, or to the exact temperatures at which said steps are carried on, since it will be obvious that longer time periods under lower temperatures, or within reasonable limits shorter time periods under higher temperatures, may be effectively employed, although we find the time periods and temperatures above stated to be preferable.

In the novel compound thus applied to porous composition board, the China wood oil and the linseedoil are the principal filling. materials. That is, these ingredients tend to solidify or form a resinous mass, under relatively hi h temperature, in the pores or interstices o the board. \The heavy naphtha serves as the principal vehicle or carrier for filling ingredlents, and the turpentine serves initially as'a solvent or carrier, but on baking also furnishesa resinous residue combining with the other filling materials. The heavy naphtha and the volatile elements of,

the tur entme evaporate during the baking step '0 the process. The. function of. the

mixed drier is to accelerate the resinous formation during the baking step, and also to contribute its solids to the resultant resinous mass. a

At the end of the bakin period the impre ating compound will ave become solidi ed into a resinous mass filling the pores or interstices of the composition, and there:

upon the compositioh board is ready for use and provides a mass which is, due to the presence of the impregnating compound, impermeable and is water and alkali resisting. Due to the fact-that the-impregnating compound not only fills the pores but also coats the surfaces of the composition board it is not necessary to provide the latter with the usual sealer coat for the back of theboard, or. with the usual primer coat for the face of the board, since the. impregnating com ound l converts the entire body of the boar into one solid impermeable mass. The composi sawed, drilled, nailed tion board treated with the above described novel impregnating compound, and by the novel method also above described, maybe cut, or subjected to any other shaping or tooling operation necessary to fit the same for installation in a building1 structure. Since the entire body of the boar is impregnated with the novel compound, sawof the board does not leave any cause damage to the ultimate surface finish water may seep or applied to the board such as blistering or peeling, due to the tirely prevented.

The. impregnated composition board is adapted to receive any kind of surface finish which may be desired, but is especially adapted to receive and hold one or more coats of presence of moisture, is enpyroxylin surfacers, sprayed, brushed, ma-

chine coated, or otherwise applied. I

If desired, applications of one or more coats of pyroxyhn enamel may be made upon the impregnated board surfaces, and such enamel .finish after drying may be buffed, polished or hot-plated, by hand or machine, to a high gloss. Should a tile effect be desired to be obtained on the surface of the board, such surface may .be scored into rectangular sections or squares without neces-c sity of applying a top coat lacquer to waterproof the same, since the impregnation process has made the entire body of the board impervious to water.

It will be understood from the above description' of the instant invention that composition board impregnated with the novel impregnating compound and b the novel method above described is very urable, and will not easily warp or swell or be otherwise distorted by exposure to dampness or wide variations oftemperature.

.With respect to the novel method of impregnatin composition board, it will be understood t at the method in its broader aspects may becarried out to .impregnate the board with raw linseed oil boiled linseed oil, or China wood oil, singly orin desired combinations with or without the addition of resins.

We claim 1. A-method of impregnating composition board bodies to render the same impervious to water and lacquer resisting, comprising, first heating the board to remove residual mois= ture and to expel air from the interstices thereof by expansion; second, immersing'the.

board while hot in a heated impregnating compound; and, third, removing the board from the impregnating compound and then baking the same under relatively high tem- Zperature.

China wood oil, linseed oil, turpentine and heavy naphtha until the compolmd thorou ly penetrates the pores thereof; and, fina ly, removing the board from the'impregnating compound and then baking the same under relatively high temperature.

3. A method of impregnating porouscomto expel air from the its position board bodies to render the same impervious to water and lacquer resisting, com-- prising, first, heatin the board to remove residual moisture and t0 90 degrees (3., allowing the ard to remain to expel air from the 5 interstices thereof by expansion; second, itnd thusimmersed for a period of 12 to 14' hours; and finally; removing the board from the impregnating com ound and then baking the same for a period up roximating4 hours uner a temperature 0? approximately 145 Q. In testimony, that we claim the invention set forth above we have hereunto set out hands this 3rd day of May, 1927.

GUSTAVE KLINKEN-STEIN. GUSTAVE D. MAGNUS. 

